Staybolt structure



E. l. DODDS.

STAYBOLT STRUCTURE.

FILED NOV- 25. 1919.

Patented Jan. 25, 1921.

g j Odl/V VE/V T 01? W e mm UNITED STATES PATENT OFFICE.

ETHAN I. DODDS, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO FLANNERY BOLTCOMPANY, OF PITTSBURGH, PENNSYLVANIA.

s rAY BoL'i: STRUCTURE.

Specification of Letters Patent.

Patented Jan. 25, 1921.

Application filed November 25, 1919. Serial No. 340.491.

To all whom it may concern:

Be it known that I, ETHAN I. Donns, a citizen of the United States, anda resident of Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements 1nStaybolt Structures; and I do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in staybolt structures forboilers,the object of the invention being to provide simple andefiicient means for effecting a closure for the opening in the boilersheet in which the head of a staybolt has its mounting.

'With this and other objects in view, the invention consists in certainnovel features of construction and combinations of parts as hereinafterset forth and pointed out in the claims.

The accompanying drawings is a sectional view partly in elevationshowing an embodiment of my invention.

1 represents the inner sheet of a boiler with which the inner endof astaybolt 2 is connected in any suitable manner. The outer end of thestaybolt is provided with a rounded head 3 and the outer sheet a of theboiler is provided with an opening 5, a portion of the wall of which isrounded to afford a seat 6 for the rounded head of the staybolt.

The opening in the outer boiler sheet is enlarged near the outer face ofsaid sheet and forms an annular shoulder 7. The boiler sheet 4 isprovided in its outer face with an annular groove 8 spaced somewhat fromthe enlarged portion of the opening in the boiler sheet and affords aseat for a 1 gasket 9.

A ring or sleeve 10 is seated on the shoulder 7 and is provided at atits inner end with a rib or flange 11' which may be rounded. When thering or sleeve 10 shall have been seated on the shoulder 7 in the boilersheet the metal indicated at 12 between the enlarged portion of theopening in the boiler sheet and the groove 8, will be spun over the ribor flange 11 at the inner end of the ring or sleeve 10, thus securingsaid ring or sleeve to the boiler sheet. That portion of the ring orsleeve 10 which proects outwardly beyond the boiler sheet 4 is 5threaded exteriorly as at 13.

A closure 14: is disposed over the end of thesleeve or ring 10 and ismade with a peripheral portion 15 which is threaded interiorly to engagethe exterior threads'of 6 the ring or sleeve. and the edge portion ofthe cap or closure may be oif-set somewhat as shown at 16. The gasket 9is'interposed between the off-set edge portion of the cap or closure andthe boiler sheet et,-said gasket 6 being located within the groove 8 inthe outer face of said boiler sheet as previously stated.

It will be evident that by turning the cap or closure on the ring orsleeve, both of said 7 members will be firmly clamped to the boilersheet and leakage will be prevented.

Having fully described my invention what I claim as new and desire tosecure by Letters-Patent is 7 1. In a staybolt structure, thecombination with a boiler sheet and a staybolt having ahead mounted inan opening in said boiler sheet, of a ring or sleevesecured to theboiler sheet coincident with said open 8 ing and provided with anexterior threaded portion and a cap or closure engaging the threadedportion of said ring or sleeve and clamped to the boiler sheet.

2. In a staybolt structure, the combina- 3 tion with a boiler sheetprovided with a bearing for the head of a staybolt, and a staybolthaving a head mounted on said bearing, of a ring or sleeve secured tothe boiler sheet and projecting outwardly be- 9 yond the same, theoutwardly projecting portion of said ring orsleeve being threadedexteriorly, a cap' or closure over the end of said ring or sleeve andover the head of the staybolt, said cap or'closure having an in- 9ternally threaded peripheral part engaging the threaded portion of thering or sleeve, and a gasket interposed between the edge portion of saidperipheral cap or closure and the outer boiler sheet.

In testimony whereof, I have signed this specification in the presenceof a subscribing witness.

ETHAN I. DODDS. Witness:

EDWIN S. Bron.

